Group by year

posts.md

@@ -4,5 +4,10 @@ title: posts
 ---
 
 {% for post in site.posts %}
+  {% capture currentyear %}{{post.date | date: "%Y"}}{% endcapture %}
+  {% if currentyear != year %}
+### {{ currentyear  }}
+    {% capture year %}{{currentyear}}{% endcapture %}
+  {% endif %}
 * {{post.date | date_to_string}}: [{{post.title}}]({{post.url | remove_first: '/' | prepend: site.baseurl}})
 {% endfor %}